315451105326221 has 4 divisors (see below), whose sum is σ = 315451992979200. Its totient is φ = 315450217673244.

The previous prime is 315451105326179. The next prime is 315451105326281. The reversal of 315451105326221 is 122623501154513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 315451105326221 - 2³⁴ = 315433925457037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315451105326281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443293211 + ... + 444004248.

It is an arithmetic number, because the mean of its divisors is an integer number (78862998244800).

Almost surely, 2^{315451105326221} is an apocalyptic number.

It is an amenable number.

315451105326221 is a deficient number, since it is larger than the sum of its proper divisors (887652979).

315451105326221 is an equidigital number, since it uses as much as digits as its factorization.

315451105326221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887652978.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 315451105326221 in words is "three hundred fifteen trillion, four hundred fifty-one billion, one hundred five million, three hundred twenty-six thousand, two hundred twenty-one".